Understanding the surrounding atmosphere and reacting accordingly with the precise decision are always fascinating features of a material. Materials that pose such responsiveness are called smart materials. Nowadays, research studies...

The concept of nanogenerators (NGs) based on textiles was introduced to impart functional attributes to textiles for developing smart textiles and integrating wearable electronics of various functionalities. The human body can generate sufficient mechanical energy that can be harvested by the piezoelectric nanogenerators (PENGs) and used to power up low power consuming wearable electronics. Two simple and easy approaches for coating a highly conductive weave-able metal electrode with polyvinylidene fluoride (PVDF) piezoelectric polymer to construct two different types of coaxial yarn-based PENGs are presented in this paper (Y-PENGs). The proposed techniques result in the in-situ formation of the β phase of the PVDF. The Y-PENGs are based on facile solution coating and touchspun nanofibers (TSNFs) coating of the inner electrode. The solution-coated Y-PENG (SC-YPENG) shows 5.12 V of peak open-circuit voltage (Voc) and 41.25 nA of peak short circuit current (Isc ). Whereas the TSNFs coated Y-PENG (NFC-YPENG) shows 5.08 V of peak Voc and 29.1 nA of peak Isc. In a series connection, the average peak Voc synergizes by ⁓2.53 and ⁓2.4 factor respectively for the SC-YPENG and the NFC-YPENG. The Y-PENGs can store charge into a capacitor and run LEDs. Additionally, our coated inner electrode shows great flexibility, thereby it could be knitted or woven into smart textiles to run wearable electronics sustainably.

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The cardinal objective of blending is to combine fibers which emphasizes good quality and minimizes poor quality. Jute is a natural fiber popularly known as the golden fiber of Bangladesh. It is one of the cheapest and strongest natural fibers and is considered the fiber for the future. Polyester is a manufactured product which tends to be very resilient, quick drying, resistant to biological damage such as mold and mildew, easy to wash and able to hold forms well. Although polyester is often maligned as a textile, it has many useful applications. The following study is an experimental research on how blending of Polyester with Jute behaves a single yarn manufactured using jute yarn manufacturing machineries. Tossa Jute of B grade and Polyester of 1.4 Denier & 32 mm staple length were chosen for the blending. The blending was performed at the 2nd Draw Frame stage of jute manufacturing system and blending ratio of jute and polyester fibers is 80:20. Count of Jute blended sliver and yarn after each stage was measured and recorded. The present work is concerned with the investigation of physical properties of manufactured jute blended yarns. Tests were conducted on blended yarn to find out Count, Twist per Inch (TPI), Strength, Quality Ratio Moisture Regain, Moisture Content, Hairiness, Percentage of Fibers in the final blended yarn etc.